| I was able to put my TTZ on the dyno a couple weekends ago... this was not a final tune, but I just wanted to look at the A/F ratio and get a rough estimate of where I am at with regards to horsepower. As you will be able to see, the A/F ratio was too lean from 2.5k to 4.5K and too rich from 5K to redline. Since the dyno day, I have been able to rewrite my chip to fix the problem areas but have not had a chance to put it back on the dyno... I have actually set it up for a very conservative tune of 11.0:1 to be run on pump fuel on the street. I just thought people might be interested in seeing what the GT28R turbos are able to do with a very rough tune. The car was running 21 psi boost with a full tank of 101 race fuel and a timing of 22-23 degrees BTDC (base timing set at 15 degrees BTDC) in the last column of the timing map. Here's the dyno (446 torque and 446 hp):
[ http://www.users.qwest.net/~jamie_esperson/ttNet/2-17-2007.pdf ] Here is the car's original dyno (269 torque and 265 hp) when the car only had intake and cat-back upgrades (in blue):
[ http://www.users.qwest.net/~jamie_esperson/ttNet/OriginalVsToday.pdf ] And finally, here is a data log from 3 days after the dyno to correct the lean and rich spots. These logs are from my Innovate LM-1 Wideband units installed in the testpipes:
[ http://www.users.qwest.net/~jamie_esperson/ttNet/overlay.pdf ]
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